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mb/google/fatcat/var/lapis: Adjust touchpad I2C frequency

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Adjust the touchpad I2C frequency to greater than 380 kHz
and less than 400 kHz.

Before:
THC0-I2C - 368KHz

After:
THC0-T2C - 388KHz

BUG=b:456906446
TEST=Rate of the actual measured machine is pass.

Change-Id: I389a1b0f56494694f1d96aa036fd41dff476c074
Signed-off-by: Hualin Wei <weihualin@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89889
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Weimin Wu <wuweimin@huaqin.corp-partner.google.com>
Reviewed-by: Pranava Y N <pranavayn@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
This commit is contained in:
Hualin Wei 2025-11-04 16:23:52 +08:00 • committed by Matt DeVillier
commit 8e2567c7a9
1 changed files with 2 additions and 0 deletions
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2
src/mainboard/google/fatcat/variants/lapis/overridetree.cb
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@ -417,6 +417,8 @@ chip soc/intel/pantherlake
register "mode" = "THC_HID_I2C_MODE"
register "dev_hidi2c.intf.hidi2c.addr" = "0x15"
register "dev_hidi2c.intf.hidi2c.descriptor_address" = "0x01"
register "soc_hidi2c.fm_scl_low_period" = "160"
register "soc_hidi2c.fm_scl_high_period" = "146"
register "wake_on_touch" = "true"
# NOTE: Use GpioInt() in _CRS and does not use GPE.
register "wake_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW_WAKE(GPP_VGPIO3_THC0)"